diff --git a/modules/service/ServiceGraph.tsx b/modules/service/ServiceGraph.tsx
index 17b7a524e..0752e3038 100644
--- a/modules/service/ServiceGraph.tsx
+++ b/modules/service/ServiceGraph.tsx
@@ -157,7 +157,7 @@ export const ServiceGraph: React.FC<ServiceGraphProps> = ({
                   },
                   title: {
                     display: true,
-                    text: 'hours',
+                    text: 'trips',
                     color: COLORS.design.subtitleGrey,
                   },
                 },
@@ -206,7 +206,7 @@ export const ServiceGraph: React.FC<ServiceGraphProps> = ({
                     ctx.fillText('No data to display', width / 2, height / 2);
                     ctx.restore();
                   }
-                  if (showTitle) drawSimpleTitle(`Daily Service Hours`, chart);
+                  if (showTitle) drawSimpleTitle(`Daily round trips`, chart);
                 },
               },
               Annotation,
diff --git a/server/chalicelib/service_levels.py b/server/chalicelib/service_levels.py
index 2e29973fd..a68ea1c96 100644
--- a/server/chalicelib/service_levels.py
+++ b/server/chalicelib/service_levels.py
@@ -102,7 +102,7 @@ def get_scheduled_service(
         if current_day_iso in scheduled_service_by_day:
             scheduled_service_count = scheduled_service_by_day[current_day_iso]["count"]
         else:
-            scheduled_service_count = 0
+            scheduled_service_count = None
         scheduled_service_arr.append(scheduled_service_count)
     counts = []
     if agg == 'daily':